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Question
If A = `[(1, 2),(3, 4)]`, B = `[(6, 1),(1, 1)]` and C = `[(-2, -3),(0, 1)]`, find the following and state if they are equal A + CB
Solution
CB = `[(-2, -3),(0, 1)][(6, 1),(1, 1)]`
= `[(-12 - 3, -2 - 3),(0 + 1, 0 + 1)]`
= `[(-15, -5),(1, 1)]`
A + CB = `[(1, 2),(3, 4)] + [(-15, -5),(1, 1)]`
= `[(-14, -3),(4, 5)]`
Thus, CA + B ≠ A + CB
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